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#AUTOCAD CIVIL 3D 2014 ROADWAY ALIGNMENTS SOFTWARE#
#AUTOCAD CIVIL 3D 2014 ROADWAY ALIGNMENTS PC#

Coming up with the temporary geometry as described here is the real challenge.

In fact, this is what design is really all about: using your knowledge and creativity to come up with a technical solution to a need or problem. In the real world, you will need to come up with this temporary geometry on your own.

Avoidance of the farmhouse and buildings, because that part of the property will be deeded back to the original owner.

#AUTOCAD CIVIL 3D 2014 ROADWAY ALIGNMENTS SOFTWARE#

AutoCAD Civil 3D is a software application used by civil engineers and. Creating and defining a horizontal alignment is one of the first steps in roadway, railroad, or site design. Alignment objects can represent road centerlines, pipe networks, and other construction baselines. This is recommended for simpler, more efficient stake-out and construction design plays a major role in every road and it is weighty in the road alignment. You create alignments as a combination of lines, curves, and spirals that are viewed as one object.

Uniform geometric properties where possible, such as 90-degree angles, parallel lines, and so on.

Perpendicular intersection with existing road that is ideal for safety and accessibility.

150' (45m) offset from road centerline to back of lots to accommodate 50' (15m) right-of-way, adequate front yard, single-family residence, and adequate rear yard.

The following list represents key considerations when creating this temporary geometry: Dimensions and notes have also been provided to help explain the reasoning behind this geometry. In the drawing for this exercise, the blue linework is provided for you and represents reference geometry to existing features of the site. With these things in mind, along with the geometry of the existing property boundaries, terrain, and other constraints, it is often helpful to create some temporary geometry to guide you in the creation of the alignments.

Every lot must also be accessible from roads built through the site. In a residential project such as the example in this book, the goal is to create as many optimally sized lots as possible within the available area.

#AUTOCAD CIVIL 3D 2014 ROADWAY ALIGNMENTS PC#

Spiral The curved portions of an alignment that change in radius from one end to the other PI (point of intersection) The place where two tangents intersect or would intersect if they were extended PC (point of curvature) The place where the curve begins PT (point of tangency) The place where the curve ends Free A line, curve, or spiral that is dependent on another alignment segment at both ends Floating A line, curve, or spiral that is dependent on another alignment segment at one end Fixed A line, curve, or spiral that is not dependent on another alignment component at either end Using Temporary GeometryĮxisting physical and legal boundary features almost always influence the layout of any land development design.

In the case of two arcs: intersecting in such a way that a line drawn from the center point of one arc to the center point of the other arc passes through the intersection pointĬurves The curved portions of an alignment that have a constant radius.

In the case of a line and arc: perpendicular to a line drawn from the intersection point to the center point of the arc.

Touching or passing through at a single point.

Corridor objects are created along one or more horizontal baselines by placing a 2D section (assembly) at incremental locations and creating matching slopes that reach a surface model at each incremental location.Before jumping into the next exercise, you may want to review the following list of terms that you will find throughout the Alignment Creation Tools commands as well as other places within Civil 3D: Tangents (alignment segments) The straight-line portions of an alignment Tangent (geometric condition)